How do you solve the problem of writing small tools / subprojects outside the main project in your company?

Question

Programming

Periodically and regularly at work I face the task of writing small tools outside the main projects. Recent examples: various kinds of parsers, an error collector from applications, an html email constructor, several monitoring tools, an internal corporate access keeper, and so on.
How do you solve such problems in your practice?
Do you use external hosting, main project servers, separate servers?
What frameworks, templates, libraries do you use for this?
The main problem is that I spend more time on these tasks than I need.